Big news - the truck runs!!!!
The wiring proved to be rather tricky to get that Gen 4 engine to run, but we perservered. I started a thread about it here where the specifics are discussed:
http://67-72chevytrucks.com/vboard/s...d.php?t=827216
We took it for a little spin after cleaning up all the underhood wires and it is so smooth and quiet! There is some programming yet in order to get the speedo and tach reading - so far nothing. Still need to clean up the dash wiring as well and connect the oil pressure sender - it started leaking oil on my shoes once it finally started to crank, so it was temporarily capped off.
The alternator is outputting 13.8V which is its default or limp mode and I would like the variable output capability. I'm not running a BCM, so will need to figure out where to run the wires from the negative cable sensor.